:root {
  --bg: #f4f6fb;
  --card: #ffffff;
  --ink: #16202e;
  --muted: #6b7a90;
  --line: #e2e8f2;
  --brand: #128c7e;
  --brand-dark: #0d6d62;
  --danger: #c0392b;
  --warn: #b7791f;
  --ok: #1e874b;
  --radius: 12px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--ink);
  font-size: 15px;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.small { font-size: 12.5px; }
.grow { flex: 1; }
.error { color: var(--danger); min-height: 18px; margin: 6px 0 0; }

/* layout */
.topbar {
  display: flex; justify-content: space-between; align-items: center;
  padding: 12px 20px; background: var(--card); border-bottom: 1px solid var(--line);
  position: sticky; top: 0; z-index: 5; flex-wrap: wrap; gap: 10px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand div { display: flex; flex-direction: column; line-height: 1.3; }
.logo { font-size: 24px; }
.topbar-right { display: flex; align-items: center; gap: 10px; }

.tabs { display: flex; gap: 4px; padding: 10px 16px 0; background: var(--card); border-bottom: 1px solid var(--line); overflow-x: auto; }
.tab {
  border: 0; background: transparent; padding: 10px 14px; cursor: pointer;
  color: var(--muted); font-size: 14px; border-bottom: 2px solid transparent; white-space: nowrap;
}
.tab.active { color: var(--brand); border-bottom-color: var(--brand); font-weight: 600; }

main { padding: 18px; max-width: 1180px; margin: 0 auto; }
.tab-panel { display: flex; flex-direction: column; gap: 16px; }

.card { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 16px; }
.card h2 { margin: 0 0 12px; font-size: 16px; }
.card h3 { margin: 16px 0 6px; font-size: 14px; }

.row { display: flex; align-items: center; }
.row.gap { gap: 10px; }
.row.wrap { flex-wrap: wrap; }
.row.between { justify-content: space-between; }
.row.center { align-items: center; }
.row.end { align-items: flex-end; }

/* forms */
label { display: flex; flex-direction: column; gap: 4px; font-size: 12.5px; color: var(--muted); }
label.inline { flex-direction: row; align-items: center; gap: 6px; }
input, select, textarea {
  font: inherit; padding: 8px 10px; border: 1px solid var(--line); border-radius: 8px;
  background: #fff; color: var(--ink); min-width: 0;
}
textarea { width: 100%; font-family: ui-monospace, SFMono-Regular, Menlo, monospace; font-size: 13px; }
input:focus, select:focus, textarea:focus { outline: 2px solid rgba(18,140,126,.35); border-color: var(--brand); }
.search { min-width: 200px; }

button { font: inherit; cursor: pointer; border-radius: 8px; padding: 8px 14px; border: 1px solid var(--line); background: #fff; }
button.primary { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600; }
button.primary:hover { background: var(--brand-dark); }
button.ghost:hover { background: #f0f3f8; }
button.link { border: 0; background: none; color: var(--brand); padding: 4px 6px; }
button:disabled { opacity: .55; cursor: not-allowed; }

/* stats */
.stats { display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr)); gap: 12px; }
.stat { background: var(--card); border: 1px solid var(--line); border-radius: var(--radius); padding: 14px; }
.stat .k { font-size: 12px; color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.stat .v { font-size: 22px; font-weight: 700; margin-top: 4px; }

.receivers { display: flex; flex-direction: column; gap: 6px; }
.receiver-line { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }

/* tables */
.table-wrap { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; font-size: 14px; }
th, td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); white-space: nowrap; }
th { font-size: 12px; text-transform: uppercase; letter-spacing: .03em; color: var(--muted); }
tbody tr:hover { background: #f8fafd; }

.badge { display: inline-block; padding: 3px 9px; border-radius: 999px; font-size: 12px; border: 1px solid var(--line); background: #f7f9fc; }
.badge.ok { background: #e7f7ee; color: var(--ok); border-color: #bfe8d0; }
.badge.pending { background: #fff5e6; color: var(--warn); border-color: #f3dcb3; }
.badge.bad { background: #fdeceb; color: var(--danger); border-color: #f5c6c2; }

/* login */
.login { min-height: 100vh; display: grid; place-items: center; padding: 20px; }
.login-card { width: min(360px, 100%); display: flex; flex-direction: column; gap: 12px; }
.login-card h1 { margin: 0; font-size: 22px; }

/* modal */
.modal { position: fixed; inset: 0; background: rgba(16,24,36,.45); display: grid; place-items: center; padding: 16px; z-index: 20; }
.modal-box { width: min(760px, 100%); max-height: 86vh; overflow: auto; }
.preview-item { border: 1px solid var(--line); border-radius: 10px; padding: 10px 12px; margin-top: 10px; }
.preview-item pre { white-space: pre-wrap; font-family: ui-monospace, Menlo, monospace; font-size: 13px; background: #f7f9fc; padding: 10px; border-radius: 8px; margin: 8px 0 0; }

/* toast */
.toast {
  position: fixed; bottom: 20px; left: 50%; transform: translateX(-50%);
  background: #16202e; color: #fff; padding: 11px 18px; border-radius: 10px; z-index: 40;
  max-width: min(560px, 92vw); box-shadow: 0 8px 24px rgba(0,0,0,.2);
}
.toast.bad { background: var(--danger); }
.toast.ok { background: var(--ok); }

@media (max-width: 640px) {
  main { padding: 12px; }
  .card { padding: 12px; }
  th, td { padding: 8px 6px; }
}